Gateways to Other Networks Flashcards
A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?
The packet will be sent directly to the destination host.
If the destination host is in the same LAN as the source host, there is no need for a default gateway. A default gateway is needed if a packet needs to be sent outside the LAN.
Typically, which network device would be used to perform NAT for a corporate environment?
router
Typically, the translation from private IP addresses to public IP addresses is performed on routers in corporate environments. In a home environment, this device might be an access point that has routing capability or the DSL or cable router.
Which characteristic describes the default gateway of a host computer?
the logical address of the router interface on the same network as the host computer
The default gateway is the IP address of an interface on the router on the same network as the sending host.
What is the purpose of configuring a default gateway address on a host?
to identify the device that allows local network computers to communicate with devices on other networks
When a host or device needs to communicate with hosts or devices on other networks, the configuration of a default gateway address is necessary so that the host or device can send data to remote networks.
If the default gateway is configured incorrectly on a host, what is the impact on communications?
The host is unable to communicate with hosts on remote networks.
In data communication, the default gateway device is involved only when a host needs to communicate with other hosts on another network. The default gateway address identifies a network device that a host device uses to communicate with devices on other networks. The default gateway device is not used when a host communicates with other hosts on the same network.
Which three IPv4 network addresses are private IP addresses?
10.0.0.0
172.16.0.0
192.168.0.0
The reserved private IPv4 network addresses include 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255.
What is the purpose of NAT?
translating private IP addresses to a public registered IP address
NAT translates host internal private IP addresses to one or more registered public IP addresses in order for the host to access sites through the internet.
What is the primary advantage of using NAT?
allows a large group of users to share one or more public IP addresses
Network Address Translation (NAT) can allow a large group of privately addressed hosts to share one or more registered public IP addresses in order to route packets over the internet.
Which three settings must be configured on a PC in order for it to communicate with devices located across the internet? (Choose three.)
IP address
subnet mask
default gateway address
A PC must be configured with an IP address, subnet mask, and a default gateway address in order to be able to communicate with devices located on a different IP network. This includes devices that are reached through the internet.
The default configuration on a home wireless router provides which type of addresses to devices using DHCP?
private IP addresses
By default, home wireless routers give out private IPv4 addresses to devices on the home network. These addresses are usually in the 192.168.0.0 reserved range.
Which type of intermediary device acts as a boundary between a home wireless network and the internet?
wireless router
A wireless router acts as a network boundary for the attached IP networks. Most home network wireless routers connect a privately addressed local LAN to an external IP network connected to an ISP.
